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IDT49C460A Datasheet(PDF) 26 Page - Integrated Device Technology |
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IDT49C460A Datasheet(HTML) 26 Page - Integrated Device Technology |
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26 / 32 page  11.6 26 IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT MILITARY AND COMMERCIAL TEMPERATURE RANGES IDT49C460A AC ELECTRICAL CHARACTERISTICS (Guaranteed Military Range Performance) Temperature range: –55 °C to +125°C, VCC = 5.0V ± 10% The inputs switch between 0V to 3V with signal measured at the 1.5V level. PROPAGATION DELAYS (1) 2584 tbl 56 SET-UP AND HOLD TIMES RELATIVE TO LATCH ENABLES 2584 tbl 57 Enable Disable From Input Enable Disable To Output Min. Max. Min. Max. Unit OE Byte0–3 d d u u DATA0–31 0 12 0 14 ns OESC d d u u SC0–7 0 12 0 14 ns OUTPUT ENABLE/DISABLE TIMES (5) 2584 tbl 58 MINIMUM PULSE WIDTHS Min. LEIN, LEOUT/ GENERATE, LEDIAG ud ud (Positive–going pulse) 12 ns NOTES: 2584 tbl 59 1. CI = 50pF. 2. These parameters are combinational propagation delay calculations, and are not tested in production. 3. Data In or Correct Data Out measurement requires timing as shown in the Switching Waveforms. 4. Set-up and Hold times relative to Latch Enables (Latching Data). 5. Output tests specified with CI = 5pF and measured to 0.5V change of output level. Testing is performed at CI = 50pF and correlated to CI = 5pF. 6. Not production tested, guaranteed by characterization. To Output From Input SC0–7 DATA0–31 ERROR ERROR MULT ERROR MULT ERROR Unit DATA0–31(3) 30 39(2) 33 36 ns CB0–7 (CODE ID1,0 = 00, 11) 19 37 22 26 ns CB0–7 (CODE ID1,0 = 10) 19 23 — — ns LEOUT/ GENERATE u u —15 d d 28 d d 28 ns d d 24 — u u 28 u u 28 ns CORRECT Not Internal Control Mode —26 — — ns DIAG MODE Not Internal Control Mode 20 29 23 27 ns CODE ID1,0 21 29 24 29 ns LEIN From latched to Transparent 30 41 33 36 ns LEDIAG From latched to Transparent u u 18 32 22 25 ns Internal Control LEDIAG From latched to Transparent u u 19 35 22 27 ns Mode DATA0–31 Via Diagnostic Latch u u 19 35(2) 23 28 ns From Input To Input (Latching Data) Set-up Time Min. Hold Time Min. Unit DATA0–3(4) d d LEIN 54 ns CB0–7(4) d d LEIN 54 ns DATA0–31(4, 6) d d LEOUT/ GENERATE 27 0 ns CB0–7 (CODE ID 00, 11)(4, 6) d d LEOUT/ GENERATE 18 0 ns CB0–7 (CODE ID 10)(4, 6) d d LEOUT/ GENERATE 18 0 ns CORRECT(4, 6) u u d d LEOUT/ GENERATE 14 0 ns DIAG MODE(4, 6) d d LEOUT/ GENERATE 20 0 ns CODE ID1,0(4, 6) d d LEOUT/ GENERATE 20 0 ns LEIN(4, 6) u u d d LEOUT/ GENERATE 28 0 ns DATA0–31(4, 6) LEDIAG 53 ns |
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